Friable chlorinated naphthalene wax



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Since the researches of Aylesworth, chlorinated naphthalene has been an article of commerce the uses for which have been steadily multiplying.

One of the most important uses for chlorinated naphthalene today is as an ingredient for lubricants, imparting high film strength and load carrying capacity thereto.

Naphthalene itself is a white crystalline substance familiar to everyone as the material from which moth balls are made. .Alphachlor-naphthalene is a liquid at ordinary temperatures. The higher chlorinated naphthalenes are waxy bodies. I shall designate these as "chlor-naphthalene waxes. These have highly desirable chemical properties, but certain physical properties that are not always so desirable. For example, chlornaphthalene wax melting at 128 C. has quasi hard lead alloys or soft copper.

For many purposes, such as incorporation in a lubricating oil, this material must be in such form as to present considerable surface to the solvent. It is not, however, always convenient for the manufacturers to cast or ship the material in small lumps. It is sometimes supplied to the market in slabs about four inches in thickness. To break up these slabs is an expensive process. They cannot be readily crushed, ground, chopped or pelleted. While the material can be out, there is no line of cleavage and this is therefore a tedious operation. To chop it is about like chopping lead or copper. A machine suitable for crushing when this material is introduced into it.

After trying various mechanical methods of breaking up this material, Iturned to the problem of incorporating something with it while in a molten condition-that would render it more readily friable. I found that this could be accomplished by incorporating with thechlor-naphthalene wax a small proportion of a hydrocarbon or fatty acid. Any sufiicien'tly stable aliphatic hydrocarbon oil or wax appears to be suitable for the purpose, as well as many animal or vege-' table oils or fats. For example, by incorporating with chlor-naphthalene wax as little as one percent of a mineral oil,'such as a lubricating oil or non-viscous neutral oil, its physical characteristics are so radically altered that it can containing one percent of zero neutral oil was readily broken up into pieces measuring about four to eight inches and these were ground in a conical corn grinder to a material nearly all of which passed an 8 mesh sieve.

While the theory of the results which I obtain is not precisely demonstratable, it is probable that the chlor-naphthalene wax is not amorphous, as it appears to be, but in reality crystalline, and that the material added separates the crystals so that they readily come apart. Any material that is miscible with the chlor-naphthalene wax while both are in a fluid condition, but incapable of forming a solid solution with it, appears to be suitable for my purpose. In general all unctuous and/0r saponifiable materials fulfill these conditions. Volatile materials are,

point of the chlor-naphthalene wax.

, For most purposes, such a small proportion of an oil of the character described is entirely unobjectionable. When the chlor-naphthalene wax is intended to be dissolved in a mineral lubrieating oil, the oil to be incorporated with it may be the same as that in which it is to be later dissolved. This has the further advantage that it tends to render the material more readily soluble in the lubricating oil.

My invention makes it possible for the menufacturers to supply chlor-naphthalene wax in any form that is found to be most convenient for casting and packing for shipment, and at the same time the purchaser is saved the cost of labor and power otherwise necessary for cutting or breaking up the material preparatory to use.

I claim as my invention:

1. As a new article of commerce, a friable waxy chlor-naphthalene composition consisting of chlor-naphthalene wax and incorporated therein substantially one per cent of unctuous material, miscible therewith when both are in fluid state but incapable of forming a solid solution therewith. I

2. As a new article of commerce, a friable waxy chlor-naphthalene composition consisting of chlor-naphthalene wax and incorporated therein substantially one per cent of an unctuous aliphatic hydrocarbon.

3. As a new article of commerce, a friable waxy chlor-naphthalene composition consisting of chlor-naphthalene wax and incorporated thereof course, excluded by the relatively high melting in substantially one per cent of petroleum lubrl- I eating oil. 

